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GCTCV

'GCTCV-119'

'GCTCV-119' at a glance

GCTCV 119

Ploidy level

3x

Genome group

AAA

Subgroup

XXX

Status

Somaclonal variant

Breeding institute

TBRI

Pedigree

'Giant Cavendish'

ITC code

ITC1282

'GCTCV-119' is a 'Giant Cavendish' tissue-culture variant selected by TBRI for its resistance to Fusarium wilt tropical race 4 (TR4), which causes disease in Cavendish cultivars. The selection was obtained by testing in infested fields tissue-culture plantlets produced from rhizomes of 'Pei Chiao'.  Its agronomic performance is generally inferior to the one of the Cavendish cultivar 'Grande Naine', but can be improved through recurrent selection using tissue-culture plantlets. Further selection for resistance in TR4-infested fields produced the variant 'GCTCV-219'.

Agronomic characteristics

'GCTCV-119' has a number of drawbacks in that it has a very tall pseudostem, a short fruit stalk, a long crop cycle, and few hands1 . In an evaluation trial conducted in the Philippines, its agronomic traits and yield were inferior to those of the Cavendish cultivar 'Grande Naine'2 . It took longer to mature (233 days compared to 162 days on average) and had a lower bunch weight that resulted in a lower yield per crop cycle and per year. Although 'GCTCV-119' had more fingers per hand, these were shorter and thinner. As a result, fewer fruits met market standards. A greater hand curvature also resulted in more rejects when packed. On the other hand, the fruits of 'GCTCV-119' were sweeter than those of 'Grande Naine'. They had significantly higher starch levels (which convert into sugars during ripening), more titratable solids and fewer acids.

In an evaluation trial in northern Queensland, Australia, the longer cropping cycle of 'GCTCV-119' was not compensated for by a heavier bunch. The bunch weight ranged from 17.3 kg to 19.5 kg3 .

Days from planting to flowering: 530.24

Days from flowering to harvest: 148.84

Days from planting to harvest: 679.14

Height at shooting (cm): 279.94

Girth at shooting (cm): 43.04

Functional leaves at shooting: 9.74

Total leaves at shooting: 10.34

Mean bunch weight (kg): 14.2, 18.8, 25.34

Finger length (cm): 21.3, 22.84

Finger girth (cm): 12.5, 12.74

Host reaction to diseases and pests

Fungal diseases

'GCTCV-119' has shown resistance to the tropical race 4 fungal strains that cause Fusarium wilt in Cavendish cultivars in field trials conducted in China5 and the Philippines2 . It is resistant to race 1 strains.

References

2 ● Molina, A.B., Fabregar, E.G., Soquita, R.O. and Sinohin, V.G.O.. 2011. Comparison of Host Reaction to Fusarium oxysporum f. sp. cubense Tropical Race 4 and Agronomic Performance of Somaclonal Variant 'GCTCV-119' (AAA, Cavendish) and 'Grand Naine' (AAA, Cavendish) in Commercial Farms in the Philippines. Proceedings of International ISHS-ProMusa Symposium on Global Perspectives on Asian Challenges, Guangzhou, China, 14-18 September 2009. Van den Bergh, I., Smith, M., Swennen, R. and Hermanto, C. (eds). Acta Horticulturae 897:399-402, ISHS, Leuven, Belgium.
3 TR4 trio tops Tully try out, in the Autumn Winter 2014 edition of Australian Bananas Magazine
4 ● ● ● ● ● ● ● ● ● Njuguna Njuguna, J., Nguthi, F., Wepukhulu, S., Wambugu, F., Gitau, D., Karuoya, M. and Karamura, D.A. 2008. Introduction and evaluation of improved banana cultivars for agronomic and yield characteristics in Kenya. African Crop Science Journal 16(1):35-40.
5 Huang, B.Z., Xu, L.B. and Molina, A.B. 2005. Preliminary evaluation of IMTP-III varieties and local cultivars against Fusarium wilt disease in southern China. Proceedings of the 3rd BAPNET Steering Committee meeting held in Guangzhou 23-26 November 2004. A.B. Molina, V.N. Roa, I. Van den Bergh and K.H. Borromeo (eds). Advancing Banana and Plantain R&D in Asia and the Pacific, Vol. 13:187-191. INIBAP, Los Baños, Laguna, Philippines.

See also on this website

Musapedia pages on GCTCV somaclonal variants:
Musapedia pages on improved materials:

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